package com.sky.handler;

import cn.hutool.core.util.StrUtil;
import com.sky.constant.MessageConstant;
import com.sky.exception.BaseException;
import com.sky.exception.SystemException;
import com.sky.result.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     * 发生异常时，会进入与该异常类型最匹配的@ExceptionHandler方法
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(BaseException ex){
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }

    @ExceptionHandler
    public Result exceptionHandler(SQLIntegrityConstraintViolationException ex) {
        String message = ex.getMessage();
        if (message.contains("Duplicate entry")) {
            String[] fields = message.split(StrUtil.SPACE);
            String name = fields[2];
            message = name + MessageConstant.ALREADY_EXISTS;
            return Result.error(message);
        } else {
            return Result.error(MessageConstant.UNKNOWN_ERROR);
        }
    }

    /**
     * 系统异常
     * @param ex
     * @return
     */
    @ExceptionHandler(SystemException.class)
    public Result doSystemHandler(SystemException ex){
        log.error("系统异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }
}
